Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd085a5bd21397b…

MALICIOUS

PDF

81.4 KB Created: 2021-03-21 02:30:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5a73aeec01aced2ac2ee16d0bc62ffc0 SHA-1: 351f92ac166837de642a97da5587ec81e33918a1 SHA-256: bdd085a5bd21397b3190600a00005f02b9b12b7a5381b32d7145e9f60b53c2aa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/wix?keyword=rama+emergency+pocket+guide+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479240/normal_5ffa4d8d956e9.pdfIn PDF document text
    • http://xurufotuzu.iblogger.org/aprendizaje_significativo_teoria.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_602867752cd31.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/what_type_of_bond_is_xef4.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/english_grammar_book_class_9.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/par_q_and_you_2019.pdfIn PDF document text
    • http://baboguzaxeleju.mypressonline.com/periyar_university_b._com_syllabus_2020.pdfIn PDF document text
    • http://penutiponexeb.iblogger.org/5011166224.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/2016_toyota_corolla_le_eco_plus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_600c529a90466.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e524accc-f6fa-4f61-aee8-86e6f9a774c8/peravolawugixofegigin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84cc76a8-ef20-436a-a6b0-cde51a88bde8/zofiwo.pdfIn PDF document text
    • http://tivijovu.epizy.com/bidaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645551c5-4023-4c57-814d-da6c4eb706a1/61826975311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de36108c-dbf8-4777-9360-ed1739f2fda2/manekagafu.pdfIn PDF document text
    • http://madulok.epizy.com/message_center_number_in_android_lollipop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a50186b-70c6-46d0-8dfe-9aa66165756f/giwosex.pdfIn PDF document text
    • http://konoxebajokebu.rf.gd/how_do_you_cure_trichotillomania.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e03a03-4e7f-4bca-83d9-58857d8e887c/zagevovoj.pdfIn PDF document text
    • http://mafozebowuveb.epizy.com/clasificacin_de_los_animales_vertebrados.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD15 5496 bytes
SHA-256: 671edcd795c6b1b37e19c7f893c38785c55f4e49fbc0d5a10d6bde429cb07d77
font_01_sfnt_off00010fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC6 11668 bytes
SHA-256: 1234f8abc6abead1be2b763e1f67b71de78f5fa84c3bc6b699f2a0dfd103ddec

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